Fix battery level of earbuds bt devices is inconsistent

Before this CL, bluetooth settings update the battery level of earbuds
when receiving first pair status callback. But sometimes the callback
will not send immediately cause the battery level is inconsistent.

This CL will update the earbuds battery level when onResum() to refresh
battery level immediately.

Bug: 174929347
Bug: 159544311
Test: make -j42 RunSettingsRoboTests
Change-Id: I8505f8fed4ec821b9fa2d88bc437bddd7a30f0e2

src/com/android/settings/bluetooth/BluetoothDevicePreference.java

@@ -175,7 +175,7 @@ public final class BluetoothDevicePreference extends GearPreference {
         mHideSecondTarget = hideSecondTarget;
     }
 
-    private void onPreferenceAttributesChanged() {
+    void onPreferenceAttributesChanged() {
         ThreadUtils.postOnBackgroundThread(() -> {
             final Pair<Drawable, String> pair =
                     BluetoothUtils.getBtRainbowDrawableWithDescription(getContext(), mCachedDevice);

src/com/android/settings/bluetooth/BluetoothDeviceUpdater.java

@@ -317,4 +317,13 @@ public abstract class BluetoothDeviceUpdater implements BluetoothCallback,
         }
         return device.getBondState() == BluetoothDevice.BOND_BONDED && device.isConnected();
     }
+
+    /**
+     * Update the attributes of {@link Preference}.
+     */
+    public void refreshPreference() {
+        for (Preference preference : mPreferenceMap.values()) {
+            ((BluetoothDevicePreference) preference).onPreferenceAttributesChanged();
+        }
+    }
 }

src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java

@@ -68,6 +68,7 @@ public class AvailableMediaDeviceGroupController extends BasePreferenceControlle
         }
         mBluetoothDeviceUpdater.registerCallback();
         mLocalBluetoothManager.getEventManager().registerCallback(this);
+        mBluetoothDeviceUpdater.refreshPreference();
     }
 
     @Override

src/com/android/settings/connecteddevice/ConnectedDeviceGroupController.java

@@ -61,6 +61,7 @@ public class ConnectedDeviceGroupController extends BasePreferenceController
         mBluetoothDeviceUpdater.registerCallback();
         mConnectedUsbDeviceUpdater.registerCallback();
         mConnectedDockUpdater.registerCallback();
+        mBluetoothDeviceUpdater.refreshPreference();
     }
 
     @Override

src/com/android/settings/connecteddevice/PreviouslyConnectedDevicePreferenceController.java

@@ -111,6 +111,7 @@ public class PreviouslyConnectedDevicePreferenceController extends BasePreferenc
         mBluetoothDeviceUpdater.registerCallback();
         mSavedDockUpdater.registerCallback();
         mContext.registerReceiver(mReceiver, mIntentFilter);
+        mBluetoothDeviceUpdater.refreshPreference();
     }
 
     @Override

src/com/android/settings/connecteddevice/SavedDeviceGroupController.java

@@ -63,6 +63,7 @@ public class SavedDeviceGroupController extends BasePreferenceController
     public void onStart() {
         mBluetoothDeviceUpdater.registerCallback();
         mSavedDockUpdater.registerCallback();
+        mBluetoothDeviceUpdater.refreshPreference();
     }
 
     @Override

tests/robotests/src/com/android/settings/bluetooth/BluetoothDeviceUpdaterTest.java

@@ -58,6 +58,7 @@ public class BluetoothDeviceUpdaterTest {
 
     private static final String MAC_ADDRESS = "04:52:C7:0B:D8:3C";
     private static final String SUB_MAC_ADDRESS = "05:52:C7:0B:D8:3C";
+    private static final String TEST_NAME = "test_name";
 
     @Mock
     private DashboardFragment mDashboardFragment;
@@ -256,4 +257,15 @@ public class BluetoothDeviceUpdaterTest {
         verify(mDevicePreferenceCallback).onDeviceRemoved(mPreference);
         assertThat(mBluetoothDeviceUpdater.mPreferenceMap.containsKey(mBluetoothDevice)).isFalse();
     }
+
+    @Test
+    public void havePreference_refreshPreference() {
+        mBluetoothDeviceUpdater.mPreferenceMap.put(mBluetoothDevice, mPreference);
+        mPreference.setTitle("fake_name");
+
+        when(mCachedBluetoothDevice.getName()).thenReturn(TEST_NAME);
+        mBluetoothDeviceUpdater.refreshPreference();
+
+        assertThat(mPreference.getTitle()).isEqualTo(TEST_NAME);
+    }
 }

tests/robotests/src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupControllerTest.java

@@ -157,9 +157,11 @@ public class AvailableMediaDeviceGroupControllerTest {
     public void testRegister() {
         // register the callback in onStart()
         mAvailableMediaDeviceGroupController.onStart();
+
         verify(mAvailableMediaBluetoothDeviceUpdater).registerCallback();
         verify(mLocalBluetoothManager.getEventManager()).registerCallback(
                 any(BluetoothCallback.class));
+        verify(mAvailableMediaBluetoothDeviceUpdater).refreshPreference();
     }
 
     @Test

tests/robotests/src/com/android/settings/connecteddevice/ConnectedDeviceGroupControllerTest.java

@@ -139,9 +139,11 @@ public class ConnectedDeviceGroupControllerTest {
     public void onStart_shouldRegisterUpdaters() {
         // register the callback in onStart()
         mConnectedDeviceGroupController.onStart();
+
         verify(mConnectedBluetoothDeviceUpdater).registerCallback();
         verify(mConnectedUsbDeviceUpdater).registerCallback();
         verify(mConnectedDockUpdater).registerCallback();
+        verify(mConnectedBluetoothDeviceUpdater).refreshPreference();
     }
 
     @Test

tests/robotests/src/com/android/settings/connecteddevice/PreviouslyConnectedDevicePreferenceControllerTest.java

@@ -147,13 +147,16 @@ public class PreviouslyConnectedDevicePreferenceControllerTest {
     public void callbackCanRegisterAndUnregister() {
         // register the callback in onStart()
         mPreConnectedDeviceController.onStart();
+
         verify(mBluetoothDeviceUpdater).registerCallback();
         verify(mDockUpdater).registerCallback();
         verify(mContext).registerReceiver(mPreConnectedDeviceController.mReceiver,
                 mPreConnectedDeviceController.mIntentFilter);
+        verify(mBluetoothDeviceUpdater).refreshPreference();
 
         // unregister the callback in onStop()
         mPreConnectedDeviceController.onStop();
+
         verify(mBluetoothDeviceUpdater).unregisterCallback();
         verify(mDockUpdater).unregisterCallback();
         verify(mContext).unregisterReceiver(mPreConnectedDeviceController.mReceiver);

tests/robotests/src/com/android/settings/connecteddevice/SavedDeviceGroupControllerTest.java

@@ -79,8 +79,10 @@ public class SavedDeviceGroupControllerTest {
     public void testRegister() {
         // register the callback in onStart()
         mSavedDeviceGroupController.onStart();
+
         verify(mBluetoothDeviceUpdater).registerCallback();
         verify(mSavedDockUpdater).registerCallback();
+        verify(mBluetoothDeviceUpdater).refreshPreference();
     }
 
     @Test